According to the designs Musk released to the public, the Hyperloop system will be able to transport people in aluminum cars and pods at speeds up to 800 mph. The design, which Musk estimates would cost roughly $6 billion to build, could potentially transport individuals from San Francisco to Los Angeles in just 30 minutes.

But some experts have raised doubts since the plans were released, and many consider the Hyperloop system more fantasy than reality. So how realistic are these plans, and could we soon see a future of high-speed transportation?

Join us for a MashTalk Google Hangout today at 2 p.m. ET on the MashableGoogle+ page to discuss the Hyperloop with Mashable Editor-in-Chief Lance Ulanoff and Reporter Vignesh Ramachandran.

Do you have questions or comments about Elon Musk and his Hyperloop design? Share them in the comments below or tweet your thoughts using the hashtag #MashTalk, and we'll try to address them during the Hangout.

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is a leading source for news, information and resources for the Connected Generation. Mashable reports on the importance of digital innovation and how it empowers and inspires people around the world. Mashable's record 42 million unique visitors worldwide and 21 million social media followers are one of the most influential and engaged online communities. Founded in 2005, Mashable is headquartered in New York City with an office in San Francisco.